Sabja

Ocimum basilicum · basil seed · tukmaria · tukh malanga · falooda seed

Drop them in water and watch each speck bloom a translucent halo — a drink you can see working.

What it is

Sabja are the small black seeds of sweet basil. Dropped in water they swell within minutes to several times their size, each dark seed developing a translucent grey coat of gel around it, so a glass fills with soft, floating pearls. They add texture and a cooling quality rather than much flavour of their own — the reason a summer sharbat is full of them.

Where it comes from

Basil grows across the subcontinent, and its seeds are used from the Indus Plains through to the south, mostly in cold drinks. In the dry heat of the plains they belong to the tradition of cooling sharbats and coolers made to get through the summer — tukh malanga sharbat above all.

What it's called

Sabja · tukh malanga (the Sindhi and Urdu name) · tukmaria · falooda seeds · sweet basil seeds. Often confused with chia, which is a different plant and swells less dramatically.

In the kitchen

Soaked in water for ten minutes until they bloom, then stirred into sweetened, rose- or lemon-scented drinks and faloodas for their soft, caviar-like texture. They are almost never cooked — the whole point is the swollen, jelly-cloaked seed suspended in a cold glass. A teaspoon thickens a tall drink.

What we know about the claims

Basil seeds attract the same fibre-and-hydration interest as chia, and there is a little to it — but they are used a spoonful at a time for texture, so read them as a pleasure, not a supplement. One practical note: always soak before use, never eat dry, as they absorb many times their volume in liquid.

Choosing and buying

Sold cheaply as sabja or tukmaria in every South Asian grocer (UK and US), and increasingly in health shops as basil seeds. A small bag lasts a whole summer. Store dry and sealed; they keep well.